Grinding attachment for milling machines



Nov. 24, 1931. G. c. REID GRINDING ATTACHMENT FOR MILLING MACHINES Fil eil Nov. 9, 1927 2 Sheets-Sheet 1 C. Reid:

(:1 Momma J Nov. 24, 1931. G. c. REID GRINDING ATTACHMENT FOR MILLING MACHINES File N 9. 1927 2 Sheets-Sheet 2 am- Z- 4 Ti 4 l 1 {H 3 z 3 5602;: 6. Reid- Patented Nov. 24, 1931 GEORGE C. REID, F EASLEY, SOUTH CAROLINA GRINDING ATTACHMENT FOR MILLING MACHINES Application filed November 9, 1827. Serial No. 232,134.

This invention relates to a grinder mechanism, and more particularly to an attachment for a milling machine, whereby it may be utilized as a grinder for edging various tools and cutters, thereby obviating the necessity of providing separate machines, the expense incident thereto and the space required.

The invention resides in the mountings whereby a grinding wheel and motor therefor may be attached to a milling machine to admit of the work table and of adjunctive parts being utilized primarily as supporting and holding means for'the tools, cutters and like parts to be ground.

While the drawings illustrate a preferred embodiment of the invention, it is to be understood that in adapting the means to meet specific needs and requirements, the design may be varied and changes in the minor details of construction may be resorted to Within the scope of the invention asclaimed, without departing from the spirit thereof.

For a full understanding of the invention and the merits thereof, reference is to be had to the following description and the drawings hereto attached, in which,

Figure 1 is an elevational view of a portion of a milling machine provided with a grinding attachment embodying the invention.

Figure 2 is an enlarged, sectional view of the attachment and supporting arm on the line 22 of Figure 1, looking to the right as designated by the arrows.

Figure 3 is a horizontal sectional View on 35 the line 3-3 of Figure 2, looking downwardly as indicated by the arrows.

Figure 4 is a sectional view on the line 4-4 of Figure 2 looking upwardly, as designated by the arrows.

Corresponding and like parts are referred to in the following description and designated inthe several views of the drawings by like reference characters.

The milling machine illustrated is of well known construction and is shown to demonstrate the application of the invention. The body of the machine is designated by the numeral 10, and 11 indicates the over arm and 12 the bracket which is adjustable vertically and supports the working table 13 and bed 14;- Which is adjustable on the bracket 12t0- wards and away fromthe body of the machine, and upon which the table 13 is adjustable laterally of the bracket 12.

In the: preferable construction the member 18 constitutes a part of the post 15 whereas the member 17 is separate and connected to the member 18 in the manner indicated.

The attachment is adjustable along the length of the arm 11 and angularly thereof,

and is secured in the required adjusted position by means of the fastenings 19 which draw the members 17 and 18 together about the arm 11 to prevent movement of the parts. The base 16 is of circular outline and is provided in its lower face with a centrally disposed pin 20 and an annular groove 0r channel 21 of approximately T-form in cross section, as indicated most clearly in Figure 2 of the drawings. The heads of bolts 22 are fitted in the T-groove or channel 21 and are insertable therein through an enlarged portion 23 indicated most clearly in Figure at of" the drawings.

The numeral 25 designates an electric motor which may be of any type. The base 26 of the motor is of circular outline and is adapted to fit against the lower face of the" base 16 and is formed centrally with an opening to receive the centering pin 20. Openings 27 are formed in the outer edge of the base 26 to receive the bolts 22 and in this, manner the motor is adapted to be secured to its support in the required adjusted position according to the nature of the work to be performed. The grinding wheel 28 is clamped to the shaft of the motor 25 and will depend upon the particular nature of the tool, cutter or article to be ground.

While, in the general use of the attachment, it will be mounted upon the over arm 11 of the milling machine and the work clamped upon the table 13 it is observed that the construction is such as to admit of the motor being detached from the support 16 and clamped to the table 13. However, instances of this use are rare, but is mentioned because the construction is such as to admit of such adaptation. The motor may be angularly adjusted to suit any particular work and the latter may be moved longitudinally or transversely by movement of the table 13 and bed 14- in a manner readily comprehended.

Having thus described the invention, I claim:

A grinding attachment for milling machines comprising a post, a clamp at the upper end of the post for mounting the same on the overarm of a milling machine, a base fixed to the lower end of the post and having an annular groove in its lower face contracted at its open side and enlarged at a point for the ingress and egress of bolt heads, an electric motor, a base carrying the motor and fitting against the grooved face of the post base and having spaced notches in its periphery, a centering pin between the two bases having its opposite ends seated in sockets in the opposed surfaces of the bases and entirely housed thereby, the groove in the base of the post being concentric with said pin, bolts engaging the peripheral notches in the base of the motor and having their heads held in the contracted an nular groove of the base of the post, and a grinding element fixed on an end of the shaft of the motor.

In testimony whereof I affix my signature.

GEORGE C. REID. [L.s.] 

